1) You do realize this thread is just a little dead right? Like by 2.5 yrs.
2) You don't have a JK, so you've got a different engine, which should impact the tone of a muffler, so asking in the TJ might work better.
3) Flowmaster mufflers should always be welded in, not just bolted in for best results. At least according to Flowmaster themselves.
4) If none of the above matters to you, I've got a 40 on my JK and really like it. Doesn't have any sort of a tuner sound and when you get on it, it's pretty throaty for a little 3.8L. It'll never sound like a V8 though.